356623522421 has 2 divisors, whose sum is σ = 356623522422. Its totient is φ = 356623522420.

The previous prime is 356623522357. The next prime is 356623522441. The reversal of 356623522421 is 124225326653.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355418668900 + 1204853521 = 596170^2 + 34711^2 .

It is a cyclic number.

It is not a de Polignac number, because 356623522421 - 2⁶ = 356623522357 is a prime.

It is a super-2 number, since 2×356623522421² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (356623522441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 178311761210 + 178311761211.

It is an arithmetic number, because the mean of its divisors is an integer number (178311761211).

Almost surely, 2^356623522421 is an apocalyptic number.

It is an amenable number.

356623522421 is a deficient number, since it is larger than the sum of its proper divisors (1).

356623522421 is an equidigital number, since it uses as much as digits as its factorization.

356623522421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 41.

The spelling of 356623522421 in words is "three hundred fifty-six billion, six hundred twenty-three million, five hundred twenty-two thousand, four hundred twenty-one".